REtinal Markers In Neuroinflammatory Diseases ("REMIND")

Inclusion Criteria: 1. All groups: * Age \>18 years old 2. Patients with Multiple Sclerosis: * Diagnosis of Multiple Sclerosis, according to the last revisions of the McDonald Criteria (2017) 3. Patients with other neuroinflammatory diseases: * Diagnosis of Neuromyelitis optica spectrum disorder or Myelin oligodendrocyte glycoprotein antibody disease or other neuroinflammatory disorders other than Multiple Sclerosis Exclusion Criteria: 1. All groups: * Inability to undergo Optical Coherence Tomography (OCT) and/or retinal vessel imaging (e.g. severe nystagmus that prevents eye fixation on both eyes) * Presence of any ocular pathology that may interfere with the validity of the OCT/retinal vessel analysis (cataracts, glaucoma, history of refractive defects \>6 D etc.). * Pregnancy and Lactation 2. Healthy Controls * History of other neurological conditions: participants with a history of other significant neurological conditions that might interfere with the assessment or interpretation of the signs and symptoms will be excluded (e.g. confirmed Stroke, Acute disseminated encephalomyelitis, Chronic inflammatory Demyelinating Disease, Polyneuropathy, etc.)